In the previous post you were provided with the instruction how to add subitems to the menu and how to display subcategories on the Shop page:
If you want to add product categories as subitems into menu read here how to do it.
If you want to display categories and subcategories directly on shop page go to WooCommerce > Settings > Products > Shop Page Display > Show Subcategories & Default Category Display > Show Subcategories
Please take our apologies but it’s difficult for us to understand what exactly you want to do.
So if you want to have the categories to be displayed as subitems in the menu you should follow this instruction: https://www.8theme.com/knowladge-base/how-to-include-product-category-into-menu/
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